Safety and protection&colon; 1&comma;Tilt protection&colon; The motor stops working when body swing degree is over 35&semi; 2&comma; Overspeed protection&colon; The pedal will tilt to prevent acceleration when speed reaches 15km&sol;h&semi; 3&comma; Low battery protection&colon; Light flashes and buzzer alarms when power is no more than 10&percnt;&semi;